These have been used once. They weren’t comfortable for me. From the Duluth Trading Co website: Features • 8mm neoprene construction for lightweight and superior cushioning in a low-profile design • 4-way flex for freedom of movement • Water resistant • Fits in any of our men's or women's work pants with built-in knee pad pockets Fabrication + Care • 6"W x 9-1/2"L • 100% neoprene • Imported